/*
 * This file is based on the Blowfish Engine that is part of the BouncyCastle JCE.
 * Copyright (c) 2000 The Legion Of The Bouncy Castle (http://www.bouncycastle.org)
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.l2jmobius.commons.crypt;

import java.io.IOException;

public class BlowfishEngine
{
	private static final int[] KP =
	{
		0x243F6A88,
		0x85A308D3,
		0x13198A2E,
		0x03707344,
		0xA4093822,
		0x299F31D0,
		0x082EFA98,
		0xEC4E6C89,
		0x452821E6,
		0x38D01377,
		0xBE5466CF,
		0x34E90C6C,
		0xC0AC29B7,
		0xC97C50DD,
		0x3F84D5B5,
		0xB5470917,
		0x9216D5D9,
		0x8979FB1B
	};
	private static final int[] KS0 =
	{
		0xD1310BA6,
		0x98DFB5AC,
		0x2FFD72DB,
		0xD01ADFB7,
		0xB8E1AFED,
		0x6A267E96,
		0xBA7C9045,
		0xF12C7F99,
		0x24A19947,
		0xB3916CF7,
		0x0801F2E2,
		0x858EFC16,
		0x636920D8,
		0x71574E69,
		0xA458FEA3,
		0xF4933D7E,
		0x0D95748F,
		0x728EB658,
		0x718BCD58,
		0x82154AEE,
		0x7B54A41D,
		0xC25A59B5,
		0x9C30D539,
		0x2AF26013,
		0xC5D1B023,
		0x286085F0,
		0xCA417918,
		0xB8DB38EF,
		0x8E79DCB0,
		0x603A180E,
		0x6C9E0E8B,
		0xB01E8A3E,
		0xD71577C1,
		0xBD314B27,
		0x78AF2FDA,
		0x55605C60,
		0xE65525F3,
		0xAA55AB94,
		0x57489862,
		0x63E81440,
		0x55CA396A,
		0x2AAB10B6,
		0xB4CC5C34,
		0x1141E8CE,
		0xA15486AF,
		0x7C72E993,
		0xB3EE1411,
		0x636FBC2A,
		0x2BA9C55D,
		0x741831F6,
		0xCE5C3E16,
		0x9B87931E,
		0xAFD6BA33,
		0x6C24CF5C,
		0x7A325381,
		0x28958677,
		0x3B8F4898,
		0x6B4BB9AF,
		0xC4BFE81B,
		0x66282193,
		0x61D809CC,
		0xFB21A991,
		0x487CAC60,
		0x5DEC8032,
		0xEF845D5D,
		0xE98575B1,
		0xDC262302,
		0xEB651B88,
		0x23893E81,
		0xD396ACC5,
		0x0F6D6FF3,
		0x83F44239,
		0x2E0B4482,
		0xA4842004,
		0x69C8F04A,
		0x9E1F9B5E,
		0x21C66842,
		0xF6E96C9A,
		0x670C9C61,
		0xABD388F0,
		0x6A51A0D2,
		0xD8542F68,
		0x960FA728,
		0xAB5133A3,
		0x6EEF0B6C,
		0x137A3BE4,
		0xBA3BF050,
		0x7EFB2A98,
		0xA1F1651D,
		0x39AF0176,
		0x66CA593E,
		0x82430E88,
		0x8CEE8619,
		0x456F9FB4,
		0x7D84A5C3,
		0x3B8B5EBE,
		0xE06F75D8,
		0x85C12073,
		0x401A449F,
		0x56C16AA6,
		0x4ED3AA62,
		0x363F7706,
		0x1BFEDF72,
		0x429B023D,
		0x37D0D724,
		0xD00A1248,
		0xDB0FEAD3,
		0x49F1C09B,
		0x075372C9,
		0x80991B7B,
		0x25D479D8,
		0xF6E8DEF7,
		0xE3FE501A,
		0xB6794C3B,
		0x976CE0BD,
		0x04C006BA,
		0xC1A94FB6,
		0x409F60C4,
		0x5E5C9EC2,
		0x196A2463,
		0x68FB6FAF,
		0x3E6C53B5,
		0x1339B2EB,
		0x3B52EC6F,
		0x6DFC511F,
		0x9B30952C,
		0xCC814544,
		0xAF5EBD09,
		0xBEE3D004,
		0xDE334AFD,
		0x660F2807,
		0x192E4BB3,
		0xC0CBA857,
		0x45C8740F,
		0xD20B5F39,
		0xB9D3FBDB,
		0x5579C0BD,
		0x1A60320A,
		0xD6A100C6,
		0x402C7279,
		0x679F25FE,
		0xFB1FA3CC,
		0x8EA5E9F8,
		0xDB3222F8,
		0x3C7516DF,
		0xFD616B15,
		0x2F501EC8,
		0xAD0552AB,
		0x323DB5FA,
		0xFD238760,
		0x53317B48,
		0x3E00DF82,
		0x9E5C57BB,
		0xCA6F8CA0,
		0x1A87562E,
		0xDF1769DB,
		0xD542A8F6,
		0x287EFFC3,
		0xAC6732C6,
		0x8C4F5573,
		0x695B27B0,
		0xBBCA58C8,
		0xE1FFA35D,
		0xB8F011A0,
		0x10FA3D98,
		0xFD2183B8,
		0x4AFCB56C,
		0x2DD1D35B,
		0x9A53E479,
		0xB6F84565,
		0xD28E49BC,
		0x4BFB9790,
		0xE1DDF2DA,
		0xA4CB7E33,
		0x62FB1341,
		0xCEE4C6E8,
		0xEF20CADA,
		0x36774C01,
		0xD07E9EFE,
		0x2BF11FB4,
		0x95DBDA4D,
		0xAE909198,
		0xEAAD8E71,
		0x6B93D5A0,
		0xD08ED1D0,
		0xAFC725E0,
		0x8E3C5B2F,
		0x8E7594B7,
		0x8FF6E2FB,
		0xF2122B64,
		0x8888B812,
		0x900DF01C,
		0x4FAD5EA0,
		0x688FC31C,
		0xD1CFF191,
		0xB3A8C1AD,
		0x2F2F2218,
		0xBE0E1777,
		0xEA752DFE,
		0x8B021FA1,
		0xE5A0CC0F,
		0xB56F74E8,
		0x18ACF3D6,
		0xCE89E299,
		0xB4A84FE0,
		0xFD13E0B7,
		0x7CC43B81,
		0xD2ADA8D9,
		0x165FA266,
		0x80957705,
		0x93CC7314,
		0x211A1477,
		0xE6AD2065,
		0x77B5FA86,
		0xC75442F5,
		0xFB9D35CF,
		0xEBCDAF0C,
		0x7B3E89A0,
		0xD6411BD3,
		0xAE1E7E49,
		0x00250E2D,
		0x2071B35E,
		0x226800BB,
		0x57B8E0AF,
		0x2464369B,
		0xF009B91E,
		0x5563911D,
		0x59DFA6AA,
		0x78C14389,
		0xD95A537F,
		0x207D5BA2,
		0x02E5B9C5,
		0x83260376,
		0x6295CFA9,
		0x11C81968,
		0x4E734A41,
		0xB3472DCA,
		0x7B14A94A,
		0x1B510052,
		0x9A532915,
		0xD60F573F,
		0xBC9BC6E4,
		0x2B60A476,
		0x81E67400,
		0x08BA6FB5,
		0x571BE91F,
		0xF296EC6B,
		0x2A0DD915,
		0xB6636521,
		0xE7B9F9B6,
		0xFF34052E,
		0xC5855664,
		0x53B02D5D,
		0xA99F8FA1,
		0x08BA4799,
		0x6E85076A
	};
	private static final int[] KS1 =
	{
		0x4B7A70E9,
		0xB5B32944,
		0xDB75092E,
		0xC4192623,
		0xAD6EA6B0,
		0x49A7DF7D,
		0x9CEE60B8,
		0x8FEDB266,
		0xECAA8C71,
		0x699A17FF,
		0x5664526C,
		0xC2B19EE1,
		0x193602A5,
		0x75094C29,
		0xA0591340,
		0xE4183A3E,
		0x3F54989A,
		0x5B429D65,
		0x6B8FE4D6,
		0x99F73FD6,
		0xA1D29C07,
		0xEFE830F5,
		0x4D2D38E6,
		0xF0255DC1,
		0x4CDD2086,
		0x8470EB26,
		0x6382E9C6,
		0x021ECC5E,
		0x09686B3F,
		0x3EBAEFC9,
		0x3C971814,
		0x6B6A70A1,
		0x687F3584,
		0x52A0E286,
		0xB79C5305,
		0xAA500737,
		0x3E07841C,
		0x7FDEAE5C,
		0x8E7D44EC,
		0x5716F2B8,
		0xB03ADA37,
		0xF0500C0D,
		0xF01C1F04,
		0x0200B3FF,
		0xAE0CF51A,
		0x3CB574B2,
		0x25837A58,
		0xDC0921BD,
		0xD19113F9,
		0x7CA92FF6,
		0x94324773,
		0x22F54701,
		0x3AE5E581,
		0x37C2DADC,
		0xC8B57634,
		0x9AF3DDA7,
		0xA9446146,
		0x0FD0030E,
		0xECC8C73E,
		0xA4751E41,
		0xE238CD99,
		0x3BEA0E2F,
		0x3280BBA1,
		0x183EB331,
		0x4E548B38,
		0x4F6DB908,
		0x6F420D03,
		0xF60A04BF,
		0x2CB81290,
		0x24977C79,
		0x5679B072,
		0xBCAF89AF,
		0xDE9A771F,
		0xD9930810,
		0xB38BAE12,
		0xDCCF3F2E,
		0x5512721F,
		0x2E6B7124,
		0x501ADDE6,
		0x9F84CD87,
		0x7A584718,
		0x7408DA17,
		0xBC9F9ABC,
		0xE94B7D8C,
		0xEC7AEC3A,
		0xDB851DFA,
		0x63094366,
		0xC464C3D2,
		0xEF1C1847,
		0x3215D908,
		0xDD433B37,
		0x24C2BA16,
		0x12A14D43,
		0x2A65C451,
		0x50940002,
		0x133AE4DD,
		0x71DFF89E,
		0x10314E55,
		0x81AC77D6,
		0x5F11199B,
		0x043556F1,
		0xD7A3C76B,
		0x3C11183B,
		0x5924A509,
		0xF28FE6ED,
		0x97F1FBFA,
		0x9EBABF2C,
		0x1E153C6E,
		0x86E34570,
		0xEAE96FB1,
		0x860E5E0A,
		0x5A3E2AB3,
		0x771FE71C,
		0x4E3D06FA,
		0x2965DCB9,
		0x99E71D0F,
		0x803E89D6,
		0x5266C825,
		0x2E4CC978,
		0x9C10B36A,
		0xC6150EBA,
		0x94E2EA78,
		0xA5FC3C53,
		0x1E0A2DF4,
		0xF2F74EA7,
		0x361D2B3D,
		0x1939260F,
		0x19C27960,
		0x5223A708,
		0xF71312B6,
		0xEBADFE6E,
		0xEAC31F66,
		0xE3BC4595,
		0xA67BC883,
		0xB17F37D1,
		0x018CFF28,
		0xC332DDEF,
		0xBE6C5AA5,
		0x65582185,
		0x68AB9802,
		0xEECEA50F,
		0xDB2F953B,
		0x2AEF7DAD,
		0x5B6E2F84,
		0x1521B628,
		0x29076170,
		0xECDD4775,
		0x619F1510,
		0x13CCA830,
		0xEB61BD96,
		0x0334FE1E,
		0xAA0363CF,
		0xB5735C90,
		0x4C70A239,
		0xD59E9E0B,
		0xCBAADE14,
		0xEECC86BC,
		0x60622CA7,
		0x9CAB5CAB,
		0xB2F3846E,
		0x648B1EAF,
		0x19BDF0CA,
		0xA02369B9,
		0x655ABB50,
		0x40685A32,
		0x3C2AB4B3,
		0x319EE9D5,
		0xC021B8F7,
		0x9B540B19,
		0x875FA099,
		0x95F7997E,
		0x623D7DA8,
		0xF837889A,
		0x97E32D77,
		0x11ED935F,
		0x16681281,
		0x0E358829,
		0xC7E61FD6,
		0x96DEDFA1,
		0x7858BA99,
		0x57F584A5,
		0x1B227263,
		0x9B83C3FF,
		0x1AC24696,
		0xCDB30AEB,
		0x532E3054,
		0x8FD948E4,
		0x6DBC3128,
		0x58EBF2EF,
		0x34C6FFEA,
		0xFE28ED61,
		0xEE7C3C73,
		0x5D4A14D9,
		0xE864B7E3,
		0x42105D14,
		0x203E13E0,
		0x45EEE2B6,
		0xA3AAABEA,
		0xDB6C4F15,
		0xFACB4FD0,
		0xC742F442,
		0xEF6ABBB5,
		0x654F3B1D,
		0x41CD2105,
		0xD81E799E,
		0x86854DC7,
		0xE44B476A,
		0x3D816250,
		0xCF62A1F2,
		0x5B8D2646,
		0xFC8883A0,
		0xC1C7B6A3,
		0x7F1524C3,
		0x69CB7492,
		0x47848A0B,
		0x5692B285,
		0x095BBF00,
		0xAD19489D,
		0x1462B174,
		0x23820E00,
		0x58428D2A,
		0x0C55F5EA,
		0x1DADF43E,
		0x233F7061,
		0x3372F092,
		0x8D937E41,
		0xD65FECF1,
		0x6C223BDB,
		0x7CDE3759,
		0xCBEE7460,
		0x4085F2A7,
		0xCE77326E,
		0xA6078084,
		0x19F8509E,
		0xE8EFD855,
		0x61D99735,
		0xA969A7AA,
		0xC50C06C2,
		0x5A04ABFC,
		0x800BCADC,
		0x9E447A2E,
		0xC3453484,
		0xFDD56705,
		0x0E1E9EC9,
		0xDB73DBD3,
		0x105588CD,
		0x675FDA79,
		0xE3674340,
		0xC5C43465,
		0x713E38D8,
		0x3D28F89E,
		0xF16DFF20,
		0x153E21E7,
		0x8FB03D4A,
		0xE6E39F2B,
		0xDB83ADF7
	};
	private static final int[] KS2 =
	{
		0xE93D5A68,
		0x948140F7,
		0xF64C261C,
		0x94692934,
		0x411520F7,
		0x7602D4F7,
		0xBCF46B2E,
		0xD4A20068,
		0xD4082471,
		0x3320F46A,
		0x43B7D4B7,
		0x500061AF,
		0x1E39F62E,
		0x97244546,
		0x14214F74,
		0xBF8B8840,
		0x4D95FC1D,
		0x96B591AF,
		0x70F4DDD3,
		0x66A02F45,
		0xBFBC09EC,
		0x03BD9785,
		0x7FAC6DD0,
		0x31CB8504,
		0x96EB27B3,
		0x55FD3941,
		0xDA2547E6,
		0xABCA0A9A,
		0x28507825,
		0x530429F4,
		0x0A2C86DA,
		0xE9B66DFB,
		0x68DC1462,
		0xD7486900,
		0x680EC0A4,
		0x27A18DEE,
		0x4F3FFEA2,
		0xE887AD8C,
		0xB58CE006,
		0x7AF4D6B6,
		0xAACE1E7C,
		0xD3375FEC,
		0xCE78A399,
		0x406B2A42,
		0x20FE9E35,
		0xD9F385B9,
		0xEE39D7AB,
		0x3B124E8B,
		0x1DC9FAF7,
		0x4B6D1856,
		0x26A36631,
		0xEAE397B2,
		0x3A6EFA74,
		0xDD5B4332,
		0x6841E7F7,
		0xCA7820FB,
		0xFB0AF54E,
		0xD8FEB397,
		0x454056AC,
		0xBA489527,
		0x55533A3A,
		0x20838D87,
		0xFE6BA9B7,
		0xD096954B,
		0x55A867BC,
		0xA1159A58,
		0xCCA92963,
		0x99E1DB33,
		0xA62A4A56,
		0x3F3125F9,
		0x5EF47E1C,
		0x9029317C,
		0xFDF8E802,
		0x04272F70,
		0x80BB155C,
		0x05282CE3,
		0x95C11548,
		0xE4C66D22,
		0x48C1133F,
		0xC70F86DC,
		0x07F9C9EE,
		0x41041F0F,
		0x404779A4,
		0x5D886E17,
		0x325F51EB,
		0xD59BC0D1,
		0xF2BCC18F,
		0x41113564,
		0x257B7834,
		0x602A9C60,
		0xDFF8E8A3,
		0x1F636C1B,
		0x0E12B4C2,
		0x02E1329E,
		0xAF664FD1,
		0xCAD18115,
		0x6B2395E0,
		0x333E92E1,
		0x3B240B62,
		0xEEBEB922,
		0x85B2A20E,
		0xE6BA0D99,
		0xDE720C8C,
		0x2DA2F728,
		0xD0127845,
		0x95B794FD,
		0x647D0862,
		0xE7CCF5F0,
		0x5449A36F,
		0x877D48FA,
		0xC39DFD27,
		0xF33E8D1E,
		0x0A476341,
		0x992EFF74,
		0x3A6F6EAB,
		0xF4F8FD37,
		0xA812DC60,
		0xA1EBDDF8,
		0x991BE14C,
		0xDB6E6B0D,
		0xC67B5510,
		0x6D672C37,
		0x2765D43B,
		0xDCD0E804,
		0xF1290DC7,
		0xCC00FFA3,
		0xB5390F92,
		0x690FED0B,
		0x667B9FFB,
		0xCEDB7D9C,
		0xA091CF0B,
		0xD9155EA3,
		0xBB132F88,
		0x515BAD24,
		0x7B9479BF,
		0x763BD6EB,
		0x37392EB3,
		0xCC115979,
		0x8026E297,
		0xF42E312D,
		0x6842ADA7,
		0xC66A2B3B,
		0x12754CCC,
		0x782EF11C,
		0x6A124237,
		0xB79251E7,
		0x06A1BBE6,
		0x4BFB6350,
		0x1A6B1018,
		0x11CAEDFA,
		0x3D25BDD8,
		0xE2E1C3C9,
		0x44421659,
		0x0A121386,
		0xD90CEC6E,
		0xD5ABEA2A,
		0x64AF674E,
		0xDA86A85F,
		0xBEBFE988,
		0x64E4C3FE,
		0x9DBC8057,
		0xF0F7C086,
		0x60787BF8,
		0x6003604D,
		0xD1FD8346,
		0xF6381FB0,
		0x7745AE04,
		0xD736FCCC,
		0x83426B33,
		0xF01EAB71,
		0xB0804187,
		0x3C005E5F,
		0x77A057BE,
		0xBDE8AE24,
		0x55464299,
		0xBF582E61,
		0x4E58F48F,
		0xF2DDFDA2,
		0xF474EF38,
		0x8789BDC2,
		0x5366F9C3,
		0xC8B38E74,
		0xB475F255,
		0x46FCD9B9,
		0x7AEB2661,
		0x8B1DDF84,
		0x846A0E79,
		0x915F95E2,
		0x466E598E,
		0x20B45770,
		0x8CD55591,
		0xC902DE4C,
		0xB90BACE1,
		0xBB8205D0,
		0x11A86248,
		0x7574A99E,
		0xB77F19B6,
		0xE0A9DC09,
		0x662D09A1,
		0xC4324633,
		0xE85A1F02,
		0x09F0BE8C,
		0x4A99A025,
		0x1D6EFE10,
		0x1AB93D1D,
		0x0BA5A4DF,
		0xA186F20F,
		0x2868F169,
		0xDCB7DA83,
		0x573906FE,
		0xA1E2CE9B,
		0x4FCD7F52,
		0x50115E01,
		0xA70683FA,
		0xA002B5C4,
		0x0DE6D027,
		0x9AF88C27,
		0x773F8641,
		0xC3604C06,
		0x61A806B5,
		0xF0177A28,
		0xC0F586E0,
		0x006058AA,
		0x30DC7D62,
		0x11E69ED7,
		0x2338EA63,
		0x53C2DD94,
		0xC2C21634,
		0xBBCBEE56,
		0x90BCB6DE,
		0xEBFC7DA1,
		0xCE591D76,
		0x6F05E409,
		0x4B7C0188,
		0x39720A3D,
		0x7C927C24,
		0x86E3725F,
		0x724D9DB9,
		0x1AC15BB4,
		0xD39EB8FC,
		0xED545578,
		0x08FCA5B5,
		0xD83D7CD3,
		0x4DAD0FC4,
		0x1E50EF5E,
		0xB161E6F8,
		0xA28514D9,
		0x6C51133C,
		0x6FD5C7E7,
		0x56E14EC4,
		0x362ABFCE,
		0xDDC6C837,
		0xD79A3234,
		0x92638212,
		0x670EFA8E,
		0x406000E0
	};
	private static final int[] KS3 =
	{
		0x3A39CE37,
		0xD3FAF5CF,
		0xABC27737,
		0x5AC52D1B,
		0x5CB0679E,
		0x4FA33742,
		0xD3822740,
		0x99BC9BBE,
		0xD5118E9D,
		0xBF0F7315,
		0xD62D1C7E,
		0xC700C47B,
		0xB78C1B6B,
		0x21A19045,
		0xB26EB1BE,
		0x6A366EB4,
		0x5748AB2F,
		0xBC946E79,
		0xC6A376D2,
		0x6549C2C8,
		0x530FF8EE,
		0x468DDE7D,
		0xD5730A1D,
		0x4CD04DC6,
		0x2939BBDB,
		0xA9BA4650,
		0xAC9526E8,
		0xBE5EE304,
		0xA1FAD5F0,
		0x6A2D519A,
		0x63EF8CE2,
		0x9A86EE22,
		0xC089C2B8,
		0x43242EF6,
		0xA51E03AA,
		0x9CF2D0A4,
		0x83C061BA,
		0x9BE96A4D,
		0x8FE51550,
		0xBA645BD6,
		0x2826A2F9,
		0xA73A3AE1,
		0x4BA99586,
		0xEF5562E9,
		0xC72FEFD3,
		0xF752F7DA,
		0x3F046F69,
		0x77FA0A59,
		0x80E4A915,
		0x87B08601,
		0x9B09E6AD,
		0x3B3EE593,
		0xE990FD5A,
		0x9E34D797,
		0x2CF0B7D9,
		0x022B8B51,
		0x96D5AC3A,
		0x017DA67D,
		0xD1CF3ED6,
		0x7C7D2D28,
		0x1F9F25CF,
		0xADF2B89B,
		0x5AD6B472,
		0x5A88F54C,
		0xE029AC71,
		0xE019A5E6,
		0x47B0ACFD,
		0xED93FA9B,
		0xE8D3C48D,
		0x283B57CC,
		0xF8D56629,
		0x79132E28,
		0x785F0191,
		0xED756055,
		0xF7960E44,
		0xE3D35E8C,
		0x15056DD4,
		0x88F46DBA,
		0x03A16125,
		0x0564F0BD,
		0xC3EB9E15,
		0x3C9057A2,
		0x97271AEC,
		0xA93A072A,
		0x1B3F6D9B,
		0x1E6321F5,
		0xF59C66FB,
		0x26DCF319,
		0x7533D928,
		0xB155FDF5,
		0x03563482,
		0x8ABA3CBB,
		0x28517711,
		0xC20AD9F8,
		0xABCC5167,
		0xCCAD925F,
		0x4DE81751,
		0x3830DC8E,
		0x379D5862,
		0x9320F991,
		0xEA7A90C2,
		0xFB3E7BCE,
		0x5121CE64,
		0x774FBE32,
		0xA8B6E37E,
		0xC3293D46,
		0x48DE5369,
		0x6413E680,
		0xA2AE0810,
		0xDD6DB224,
		0x69852DFD,
		0x09072166,
		0xB39A460A,
		0x6445C0DD,
		0x586CDECF,
		0x1C20C8AE,
		0x5BBEF7DD,
		0x1B588D40,
		0xCCD2017F,
		0x6BB4E3BB,
		0xDDA26A7E,
		0x3A59FF45,
		0x3E350A44,
		0xBCB4CDD5,
		0x72EACEA8,
		0xFA6484BB,
		0x8D6612AE,
		0xBF3C6F47,
		0xD29BE463,
		0x542F5D9E,
		0xAEC2771B,
		0xF64E6370,
		0x740E0D8D,
		0xE75B1357,
		0xF8721671,
		0xAF537D5D,
		0x4040CB08,
		0x4EB4E2CC,
		0x34D2466A,
		0x0115AF84,
		0xE1B00428,
		0x95983A1D,
		0x06B89FB4,
		0xCE6EA048,
		0x6F3F3B82,
		0x3520AB82,
		0x011A1D4B,
		0x277227F8,
		0x611560B1,
		0xE7933FDC,
		0xBB3A792B,
		0x344525BD,
		0xA08839E1,
		0x51CE794B,
		0x2F32C9B7,
		0xA01FBAC9,
		0xE01CC87E,
		0xBCC7D1F6,
		0xCF0111C3,
		0xA1E8AAC7,
		0x1A908749,
		0xD44FBD9A,
		0xD0DADECB,
		0xD50ADA38,
		0x0339C32A,
		0xC6913667,
		0x8DF9317C,
		0xE0B12B4F,
		0xF79E59B7,
		0x43F5BB3A,
		0xF2D519FF,
		0x27D9459C,
		0xBF97222C,
		0x15E6FC2A,
		0x0F91FC71,
		0x9B941525,
		0xFAE59361,
		0xCEB69CEB,
		0xC2A86459,
		0x12BAA8D1,
		0xB6C1075E,
		0xE3056A0C,
		0x10D25065,
		0xCB03A442,
		0xE0EC6E0E,
		0x1698DB3B,
		0x4C98A0BE,
		0x3278E964,
		0x9F1F9532,
		0xE0D392DF,
		0xD3A0342B,
		0x8971F21E,
		0x1B0A7441,
		0x4BA3348C,
		0xC5BE7120,
		0xC37632D8,
		0xDF359F8D,
		0x9B992F2E,
		0xE60B6F47,
		0x0FE3F11D,
		0xE54CDA54,
		0x1EDAD891,
		0xCE6279CF,
		0xCD3E7E6F,
		0x1618B166,
		0xFD2C1D05,
		0x848FD2C5,
		0xF6FB2299,
		0xF523F357,
		0xA6327623,
		0x93A83531,
		0x56CCCD02,
		0xACF08162,
		0x5A75EBB5,
		0x6E163697,
		0x88D273CC,
		0xDE966292,
		0x81B949D0,
		0x4C50901B,
		0x71C65614,
		0xE6C6C7BD,
		0x327A140A,
		0x45E1D006,
		0xC3F27B9A,
		0xC9AA53FD,
		0x62A80F00,
		0xBB25BFE2,
		0x35BDD2F6,
		0x71126905,
		0xB2040222,
		0xB6CBCF7C,
		0xCD769C2B,
		0x53113EC0,
		0x1640E3D3,
		0x38ABBD60,
		0x2547ADF0,
		0xBA38209C,
		0xF746CE76,
		0x77AFA1C5,
		0x20756060,
		0x85CBFE4E,
		0x8AE88DD8,
		0x7AAAF9B0,
		0x4CF9AA7E,
		0x1948C25C,
		0x02FB8A8C,
		0x01C36AE4,
		0xD6EBE1F9,
		0x90D4F869,
		0xA65CDEA0,
		0x3F09252D,
		0xC208E69F,
		0xB74E6132,
		0xCE77E25B,
		0x578FDFE3,
		0x3AC372E6
	};
	
	private static final int ROUNDS = 16;
	private static final int BLOCK_SIZE = 8; // bytes = 64 bits
	private static final int SBOX_SK = 256;
	private static final int P_SZ = ROUNDS + 2;
	private final int[] S0; // the s-boxes
	private final int[] S1; // the s-boxes
	private final int[] S2; // the s-boxes
	private final int[] S3; // the s-boxes
	private final int[] P; // the p-array
	private byte[] workingKey = null;
	
	public BlowfishEngine()
	{
		S0 = new int[SBOX_SK];
		S1 = new int[SBOX_SK];
		S2 = new int[SBOX_SK];
		S3 = new int[SBOX_SK];
		P = new int[P_SZ];
	}
	
	/**
	 * Initialize a Blowfish cipher.
	 * @param key the key used to set up the cipher
	 */
	public void init(byte[] key)
	{
		workingKey = key;
		setKey(workingKey);
	}
	
	public String getAlgorithmName()
	{
		return "Blowfish";
	}
	
	public int getBlockSize()
	{
		return BLOCK_SIZE;
	}
	
	private int func(int x)
	{
		return (((S0[(x >>> 24)] + S1[(x >>> 16) & 0xff]) ^ S2[(x >>> 8) & 0xff]) + S3[x & 0xff]);
	}
	
	/**
	 * apply the encryption cycle to each value pair in the table.
	 * @param xl
	 * @param xr
	 * @param table
	 */
	@SuppressWarnings("all")
	private void processTable(int xl, int xr, int[] table)
	{
		final int size = table.length;
		for (int s = 0; s < size; s += 2)
		{
			xl ^= P[0];
			xr ^= func(xl) ^ P[1];
			xl ^= func(xr) ^ P[2];
			xr ^= func(xl) ^ P[3];
			xl ^= func(xr) ^ P[4];
			xr ^= func(xl) ^ P[5];
			xl ^= func(xr) ^ P[6];
			xr ^= func(xl) ^ P[7];
			xl ^= func(xr) ^ P[8];
			xr ^= func(xl) ^ P[9];
			xl ^= func(xr) ^ P[10];
			xr ^= func(xl) ^ P[11];
			xl ^= func(xr) ^ P[12];
			xr ^= func(xl) ^ P[13];
			xl ^= func(xr) ^ P[14];
			xr ^= func(xl) ^ P[15];
			xl ^= func(xr) ^ P[16];
			xr ^= P[17];
			table[s] = xr;
			table[s + 1] = xl;
			xr = xl; // end of cycle swap
			xl = table[s];
		}
	}
	
	private void setKey(byte[] key)
	{
		/**
		 * - comments are from _Applied Crypto_, Schneier, p338.<br>
		 * Please be careful comparing the two, AC numbers the arrays from 1, the enclosed code from 0.<br>
		 * (1) Initialize the S-boxes and the P-array, with a fixed string This string contains the hexadecimal digits of pi (3.141...)
		 */
		System.arraycopy(KS0, 0, S0, 0, SBOX_SK);
		System.arraycopy(KS1, 0, S1, 0, SBOX_SK);
		System.arraycopy(KS2, 0, S2, 0, SBOX_SK);
		System.arraycopy(KS3, 0, S3, 0, SBOX_SK);
		System.arraycopy(KP, 0, P, 0, P_SZ);
		/**
		 * (2) Now, XOR P[0] with the first 32 bits of the key, XOR P[1] with the second 32-bits of the key, and so on for all bits of the key (up to P[17]).<br>
		 * Repeatedly cycle through the key bits until the entire P-array has been XOR-ed with the key bits
		 */
		final int keyLength = key.length;
		int keyIndex = 0;
		for (int i = 0; i < P_SZ; i++)
		{
			// get the 32 bits of the key, in 4 * 8 bit chunks
			int data = 0x0000000;
			for (int j = 0; j < 4; j++)
			{
				// create a 32 bit block
				data = (data << 8) | (key[keyIndex++] & 0xff);
				// wrap when we get to the end of the key
				if (keyIndex >= keyLength)
				{
					keyIndex = 0;
				}
			}
			// XOR the newly created 32 bit chunk onto the P-array
			P[i] ^= data;
		}
		/**
		 * (3) Encrypt the all-zero string with the Blowfish algorithm, using the subkeys described in (1) and (2)<br>
		 * (4) Replace P1 and P2 with the output of step (3)<br>
		 * (5) Encrypt the output of step(3) using the Blowfish algorithm, with the modified subkeys.<br>
		 * (6) Replace P3 and P4 with the output of step (5)<br>
		 * (7) Continue the process, replacing all elements of the P-array and then all four S-boxes in order, with the output of the continuously changing Blowfish algorithm
		 */
		processTable(0, 0, P);
		processTable(P[P_SZ - 2], P[P_SZ - 1], S0);
		processTable(S0[SBOX_SK - 2], S0[SBOX_SK - 1], S1);
		processTable(S1[SBOX_SK - 2], S1[SBOX_SK - 1], S2);
		processTable(S2[SBOX_SK - 2], S2[SBOX_SK - 1], S3);
	}
	
	/**
	 * Method to encrypt the block at the given index.<br>
	 * The encrypted block goes directly to the source array at the given index.
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to encrypt is located
	 * @throws IllegalStateException The cipher was not yet initialized
	 * @throws IOException The source array is too small to hold a block at the given index
	 */
	public void tryEncryptBlock(byte[] src, int srcIndex) throws IOException
	{
		if (workingKey == null)
		{
			throw new IllegalStateException("Blowfish not initialized");
		}
		if ((srcIndex + BLOCK_SIZE) > src.length)
		{
			throw new IOException("input buffer too short");
		}
		encryptBlock(src, srcIndex);
	}
	
	/**
	 * Method to encrypt the block at the given index.<br>
	 * The encrypted block goes to the destination array at the given index.
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to encrypt is located
	 * @param dst destination array the encryption will go to
	 * @param dstIndex index where the encrypted block is to be stored
	 * @throws IllegalStateException The cipher was not yet initialized
	 * @throws IOException The source or destination array is too small to hold a block at the given index
	 */
	public void tryEncryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex) throws IOException
	{
		if (workingKey == null)
		{
			throw new IllegalStateException("Blowfish not initialized");
		}
		if ((srcIndex + BLOCK_SIZE) > src.length)
		{
			throw new IOException("input buffer too short");
		}
		if ((dstIndex + BLOCK_SIZE) > dst.length)
		{
			throw new IOException("output buffer too short");
		}
		encryptBlock(src, srcIndex, dst, dstIndex);
	}
	
	/**
	 * Method to encrypt the block at the given index.<br>
	 * The encrypted block goes directly to the source array at the given<br>
	 * index.<br>
	 * <br>
	 * This method does not perform any error checking. This could be<br>
	 * usefull when code calling this method performs size checks already or<br>
	 * perfroming steps to ensure nothing can go wrong.<br>
	 * <br>
	 * If you want error checking use {@link #tryEncryptBlock(byte[], int)}.
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to encrypt is located
	 */
	public void encryptBlock(byte[] src, int srcIndex)
	{
		encryptBlock(src, srcIndex, src, srcIndex);
	}
	
	/**
	 * Method to encrypt the block at the given index.<br>
	 * The encrypted block goes to the destination array at the given index.<br>
	 * <br>
	 * This method does not perform any error checking. This could be<br>
	 * usefull when code calling this method performs size checks already or<br>
	 * perfroming steps to ensure nothing can go wrong.<br>
	 * <br>
	 * If you want error checking use {@link #tryEncryptBlock(byte[], int, byte[], int)}.
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to encrypt is located
	 * @param dst destination array the encryption will go to
	 * @param dstIndex index where the encrypted block is to be stored
	 */
	public void encryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
	{
		int xl = bytesTo32bits(src, srcIndex);
		int xr = bytesTo32bits(src, srcIndex + 4);
		xl ^= P[0];
		xr ^= func(xl) ^ P[1];
		xl ^= func(xr) ^ P[2];
		xr ^= func(xl) ^ P[3];
		xl ^= func(xr) ^ P[4];
		xr ^= func(xl) ^ P[5];
		xl ^= func(xr) ^ P[6];
		xr ^= func(xl) ^ P[7];
		xl ^= func(xr) ^ P[8];
		xr ^= func(xl) ^ P[9];
		xl ^= func(xr) ^ P[10];
		xr ^= func(xl) ^ P[11];
		xl ^= func(xr) ^ P[12];
		xr ^= func(xl) ^ P[13];
		xl ^= func(xr) ^ P[14];
		xr ^= func(xl) ^ P[15];
		xl ^= func(xr) ^ P[16];
		xr ^= P[17];
		bits32ToBytes(xr, dst, dstIndex);
		bits32ToBytes(xl, dst, dstIndex + 4);
	}
	
	/**
	 * Method to decrypt the block at the given index.<br>
	 * The decrypted block goes directly to the source array at the given<br>
	 * index.
	 * @param src source array with the encrypted data
	 * @param srcIndex index where the block to decrypt is located
	 * @throws IllegalStateException The cipher was not yet initialized
	 * @throws IOException The source array is too small to hold a block at the given index
	 */
	public void tryDecryptBlock(byte[] src, int srcIndex) throws IOException
	{
		if (workingKey == null)
		{
			throw new IllegalStateException("Blowfish not initialized");
		}
		if ((srcIndex + BLOCK_SIZE) > src.length)
		{
			throw new IOException("input buffer too short");
		}
		decryptBlock(src, srcIndex);
	}
	
	/**
	 * Method to decrypt the block at the given index.<br>
	 * The decrypted block goes to the destination array at the given index.<br>
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to decrypt is located
	 * @param dst destination array the decryption will go to
	 * @param dstIndex index where the decrypted block is to be stored
	 * @throws IllegalStateException The cipher was not yet initialized
	 * @throws IOException The source or destination array is too small to hold a block at the given index
	 */
	public void tryDecryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex) throws IOException
	{
		if (workingKey == null)
		{
			throw new IllegalStateException("Blowfish not initialized");
		}
		if ((srcIndex + BLOCK_SIZE) > src.length)
		{
			throw new IOException("input buffer too short");
		}
		if ((dstIndex + BLOCK_SIZE) > src.length)
		{
			throw new IOException("output buffer too short");
		}
		decryptBlock(src, srcIndex, dst, dstIndex);
	}
	
	/**
	 * Method to decrypt the block at the given index.<br>
	 * The decrypted block goes directly to the source array at the given<br>
	 * index.<br>
	 * <br>
	 * This method does not perform any error checking. This could be<br>
	 * usefull when code calling this method performs size checks already or<br>
	 * perfroming steps to ensure nothing can go wrong.<br>
	 * <br>
	 * If you want error checking use {@link #tryDecryptBlock(byte[], int)}.
	 * @param src source array with the encrypted data
	 * @param srcIndex index where the block to decrypt is located
	 */
	public void decryptBlock(byte[] src, int srcIndex)
	{
		decryptBlock(src, srcIndex, src, srcIndex);
	}
	
	/**
	 * Method to decrypt the block at the given index.<br>
	 * The decrypted block goes to the destination array at the given index.<br>
	 * <br>
	 * This method does not perform any error checking. This could be<br>
	 * usefull when code calling this method performs size checks already or<br>
	 * perfroming steps to ensure nothing can go wrong.<br>
	 * <br>
	 * If you want error checking use {@link #tryDecryptBlock(byte[], int, byte[], int)}.
	 * @param src source array with the plain data
	 * @param srcIndex index where the block to decrypt is located
	 * @param dst destination array the decryption will go to
	 * @param dstIndex index where the decrypted block is to be stored
	 * @throws IllegalStateException The cipher was not yet initialized
	 */
	public void decryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
	{
		int xl = bytesTo32bits(src, srcIndex);
		int xr = bytesTo32bits(src, srcIndex + 4);
		xl ^= P[17];
		xr ^= func(xl) ^ P[16];
		xl ^= func(xr) ^ P[15];
		xr ^= func(xl) ^ P[14];
		xl ^= func(xr) ^ P[13];
		xr ^= func(xl) ^ P[12];
		xl ^= func(xr) ^ P[11];
		xr ^= func(xl) ^ P[10];
		xl ^= func(xr) ^ P[9];
		xr ^= func(xl) ^ P[8];
		xl ^= func(xr) ^ P[7];
		xr ^= func(xl) ^ P[6];
		xl ^= func(xr) ^ P[5];
		xr ^= func(xl) ^ P[4];
		xl ^= func(xr) ^ P[3];
		xr ^= func(xl) ^ P[2];
		xl ^= func(xr) ^ P[1];
		xr ^= P[0];
		bits32ToBytes(xr, dst, dstIndex);
		bits32ToBytes(xl, dst, dstIndex + 4);
	}
	
	/**
	 * Method to construct an int from the source array.<br>
	 * 4 bytes are used from the given index.<br>
	 * <br>
	 * This method does not do any error checking.
	 * @param src source array with the bytes
	 * @param srcIndex the index to extract the int from
	 * @return the extracted integer
	 */
	private int bytesTo32bits(byte[] src, int srcIndex)
	{
		return ((src[srcIndex + 3] & 0xff) << 24) | ((src[srcIndex + 2] & 0xff) << 16) | ((src[srcIndex + 1] & 0xff) << 8) | (src[srcIndex] & 0xff);
	}
	
	/**
	 * Method to decompose an int into a byte array.<br>
	 * <br>
	 * This method does not do any error checking.
	 * @param in the integer to decompose into bytes
	 * @param dst the destination array the decomposed int goes to
	 * @param dstIndex the index in the destination array the decomposed int will be stored at
	 */
	private void bits32ToBytes(int in, byte[] dst, int dstIndex)
	{
		dst[dstIndex] = (byte) in;
		dst[dstIndex + 1] = (byte) (in >> 8);
		dst[dstIndex + 2] = (byte) (in >> 16);
		dst[dstIndex + 3] = (byte) (in >> 24);
	}
}
